Other
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985angeo...3..451m&link_type=abstract
Annales Geophysicae (ISSN 0755-0685), vol. 3, July-Aug. 1985, p. 451-464.
Other
Atmospheric Models, Gravity Waves, Internal Waves, Mesosphere, Stratosphere, Wave Propagation, Atmospheric Boundary Layer, Brunt-Vaisala Frequency, Flow Velocity, Flux Density, Neutral Atmospheres, Vertical Distribution
Scientific paper
The coupled equations previously derived for the wave action, vertical wavenumber, and mean flow associated with vertically propagating, two-dimensional nonlinear internal gravity waves are presently solved numerically for two model atmospheres: an idealized one, lacking mean shear, whose Brunt-Vaisala frequency is independent of height, and another that includes the main features of the midlatitude winter's middle atmosphere. The dominant nonlinear effect of the waves is a modification of the mean flow, which reduces the magnitude of the intrinsic wave frequency and generates a layer of large shear at a height that is dependent on the wave amplitude near the source. It is noted that wave-mean flow interactions can produce large wave amplitudes in the upper mesosphere, in agreement with observations.
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